Gasteropoda — continued. 



Turbonilla 



Odostomia 



Pyramidella 



Cerithium 



Cerithiopsis 



Potamides 



Rissoina 



Rissoa 



Liotia 



Turbo 



Imperator 



Calcar 



Delphinula 



Trochus 



Gibbula 



Zizyphinus 



Thalotia 



Eiichelus 



Maro;arita 



Haliotis 



Figsureliidag 



Emarginula 



Actceon 



Ringicula 



Cylichna 



Scapbopoda. 

 Uentalium . 



Eotalis 



Cadulus . . . 



